/Engine/Source/Editor/PropertyEditor/Public/PropertyHandle.h
Get metadata map for this property instance (as opposed to the class)
Map ptr containing metadata pairs; nullptr if property node is invalid
const [TMap](API\Runtime\Core\Containers\TMap)< [FName](API\Runtime\Core\UObject\FName), [FString](API\Runtime\Core\Containers\FString) > * GetInstanceMetaDataMap() const